The effects of the traditional Chinese medicine mixture- Zengmianling on Duck Adenovirus Inactivated Vaccine are reported in this paper. The results showed that: OThe traditional Chinese medicine mixture enhanced apparently the activity of CuZn-SOD in red blood cell on 3, 7, 14, 2ldays after using the medicine. Especially, the activity of CuZn-SOD reached the peak on 1 4~ day after using the medicine and there was significant difference between A and B,C ,P |